10_43.cpp

C++语言程序设计案例教程,郑莉编的书

#include <iostream>   
#include <numeric>	//包含数值算法头文件
using namespace std;
class multclass	//定义multclass类
{ public:
	int operator()(int x, int y) const {return x*y;}	//重载操作符operator()
};
void main()
{	int A[] = {1, 2, 3, 4, 5};  const int N = sizeof(A) / sizeof(int);
	cout << "The result by multipling all elements in A is "
		<< accumulate(A, A + N, 1, multclass());	//将类multclass传递给通用算法
}